Used coffee grounds could be used to make biodiesel
A team of chemical engineers from the University of Nevada is working on a process for extracting that oil and turning it into a different kind of liquid fuel. Narasimharao Kondamudi, Susanta Mohapatra, and Mano Misra believe that the anti-oxidants in coffee can also help overcome one of the drawbacks of other biodiesels, namely the tendency to break down. After extracting the oil from the used coffee grounds, the team used a conventional transesterification process that's commonly used with other plant oils to make diesel and got a 100 percent conversion rate. The team calculates that, worldwide, 340 million gallons of biodiesel could be produced annually from used coffee grounds.
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